Jeff Diehl of Spots Unknown created this mini-documentary gem featuring Bill Holloway and Mauro Hernandez, of Masterworks Woodworking, who rescue condemned urban trees, then turn them into exquisite wooden bicycles. Diehl writes of the duo: "They're self-taught, and the custom bikes are an offshoot of their larger woodworking and detailing business. Bill is a native San Franciscan, and his family has deep roots here. The dynamic between him and Mauro is a compelling, friendly rivalry."

See for yourself:

Video: Urban Tree to Bicycle from Spots Unknown.